Steam-generator



EN 1 n o (No Model.) 2 Sheets--Sheet 1.

W. COOPER.

STEAM GENERATOR. No. 283,756'. 'Patented Aug. 28, 1883. i

UNrrnn 'Starts PATENT Ormea I/VILLIAM COOPER, OF CHICAGO, ILLINOIS.

sTEAn/l-eENl-z/RATOR.

SPECFICATON forming part of Letters Patent No. 283,756, dated August 28, 1883,

Application filed July 5, 182.

` and the objects 'of my invention are to provide for the construction of steam generators -entirely of cast metal by means of novel forms of castings and water-tight joints, so that such generators may be made cheaper, more durable, and to withstand the required steam-pressv ure to fully adapt them to the purpose intended, and thereby lessen their tendency to explov sions which frequently occur in those oi' the present day, constructed, as they are, partly of sheet metal; to protect the several parts of the generator and heated surfaces from the destructive influences to which they are subjected, and at the same time provide an extensive heatingsurface for generating steam; to decrease the number of water-tight joints now necessary in the present construction of generators, and, iinally, to provide a valve operating in the water-supply pipe and outside of the generator for convenience in repairs, said valve being operated by a float in the generator or other suitable means, and by the pressure of the water entering the generator in such .a manner as to automatically regulate the supply of water to the generator. I attain these objects by the devices illustrated in the accompanying drawings, in which- Figure l is a side elevation of a generator embodying my invention, with parts broken away to show a longitudinal section of the valve 'and its connection with the float; and

, Fig. 2, a vertical section through the generalNo model.)

l means of a button, c, convenient ofv access from the ash-pit door C; but while this arl rangement of grate-bars is convenient, I do not claim it as a part of my invention, and it may be added that any other convenient form may be employed. Supported near the inner edge of the annular flange b is the inner shell, D, of the generator,which shell forms theiirechamber, and is cast in one piece with apipe, d, projecting above the ire-chamber and forming a combined ilue and feed for the same, as will hereinafter be more fully described. The outer shell' of the generator is cast in two parts, E F, the former and lower portion of which is cone-shaped to correspond with the nrecha'niber, and the two parts being' connected together by means of bolts c passing through corresponding flanges f g, upon the respective sections E F of the outer shell, a suitable packing, h, being employed to render the jointwater-tight. The base of section E of the outer shell falls just within the ilange a, and is provided with an annular ilange, t, connected with a corresponding ilange, 7c, on shell D, by bolts Z, which serve to clamp the two shells together, and, with a suitable packing, form awater-tight joint between them, the flange c serving to prevent the shells from shifting out of place, though to this end they might be bolted in any suitable manner to the flange b lsupporting them.

Cast with the section F is a dome, G, flanged to receive bolts securing ahead, H, having a central opening in which a safety-valve, I, operates, said head being also perforated (see Fig. l) to receive steam-pipes If; L, one of which pipes. may lead to a cooking-vessel and the other to a vat containing clothes, and both pipes being provided with suitable cut-oil valves, Z m, respectively. The opening in the section F, through which the flue d passes, is provided with a surrounding annular flange, n, having its inner face beveled, whereby, when a ring, o, of soft metal is driven to place, it will wedge between the flange and the flue to form a tight joint. J ointed to the ilue d is av section or' pipe, M, in which is formed a chute, N, provided with a door, O, and serving as a feed through which fuel is supplied to the fire-chamber.

It will be observed that by the construction described the more important parts of the IOO land the desired depth of water in the boiler is generator, and especially those necessary to be of considerable strength and` durability to stand the steam-pressure and the destructive influences of the heat, may be of cast metal and conveniently and eifectually connected together, so that every joint will be water-tight.

Furthermore, by the particular conformation and arrangement of the shells the entire heating-surface of the fire-chamber is not only utilized for generating steam, but is so protected by the surrounding water-jacket that it cannot be, except after a very long time, de-

stroyed by the influences of heat; and it may also beadded that when any of the ports are injured by heat or otherwise they may be removed and asubstitution of new ports be made without injury to the remaining portions of the generator, which frequently occurs in other constructions.

Shell F is perforated near its base and near the water-line to receive a bushing, 1, provided upon its inner end with a lug, 2, to which is pivoted an arm, 3, carrying upon its free end a float, 4, pivoted or otherwise secured to the arm, but Vpreferably pivoted so that the float may assume an upright position without regard tor the angleat which the arm is held, thereby increasing the effectiveness of the iloat,owing to its receiving a direct pressure of the boiling water over its broadest face. Arm 3 is provided near its pivoted end with a lug, 5, to which is pivoted a valve-rod, 6, screw-threaded upon its outer end and. carrying a correspondingly screw-threaded coneshaped valve, 7, adjustable upon said rod and operating in an inlet-pipe, 8, enlarged at its inner end to receive the valve and removably joined to the bushing by a screw-threaded collar, 9, working on the projecting and screwthreadedend of the bushing. n

In operation the valve is pushed -forward to close the inlet-pipe when the iioat rises andlifts with it the arm 3, the pivoted valve-rod enabling the valve to move in a plane with the inlet-pipe and not pinch in the same as it would if the valve-rod were rigid. The height at which the float must rise to effect this result determined by the adjustment ofthe valve on its rod-as, for instance, as shown in.. Fig. l the oat will have to rise much higher and the valve move farther forward to closethe inletpipe, and hence the water is kept at a greater depth in the boiler than if the valve were at the extremity ofthe valve-rod. By having one valve operating with a forward stroke against the column of water to closethe boiler-pipe, the valve is actuated by the pressure of theV inflowing water as well as by the float to throw it open, and consequently the movement of the valve and its response to the demands of the Y boiler is madequick and positive.

Rising from about the center of the top of the nre-chamber is a slotted standard, 10, forming a guide for arm 3 to prevent a lateral motion of the arm by the float, and consequently a binding of the arm on its pivot.

The valve above described is essential to the successful operation of my boiler, but is also adapted as afeed-water device to other boilers hence I do not broadly claim said valve in this application, but reserve the right to make such claim in another application.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a steam-generator, the combination, with the base provided with the vertical ange a and horizontal flange b, of the inner and outer shells provided with overlapping iianges i k, and supported upon and conned by said flanges a b, substantially as described.

2. rlhe combination, with the inner shell or fire-chamber having cast therewith the flue d, of an outer shell joined to the inner shell forining an intermediate water-space and cast in two sections joined together, the upper section of which outer shell is provided with an annular iiange inclined upon its inner edge and a ring-packing forming a joint between the 9o flue and said ange, substantially as described.

WILLIAM COOPER.

Vitnesses.

JNO. G. ELLIOTT, W. W. ELLIOTT. 

